<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品名称" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="{ expandTrigger: 'hover',label:'cat_name',value:'cat_id',children:'children' }" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="item2" v-for="(item2,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传到的接口地址 -->
            <el-upload :headers="headerObj" :on-success="handleSuccess" :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemoveImg" list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="提示" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所出的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
            { required: true, message: '请输入商品名称', trigger: 'blur' }
          ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }

        ]
      },
      // 商品分类列表
      cateList: [],
      // 动态参数列表
      manyTableData: [],
      // 静态参数列表
      onlyTableData: [],
      uploadURL: 'http://timemeetyou.com:8889/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      } else {
        return null
      }
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！')
      }
      this.$message.success('获取商品分类数据成功！')
      this.cateList = res.data
      console.log(this.cateList)
    },
    // 级联选择器选中项变化触发事件
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 标签页切换之前触发的事件
    beforeTabLeave(activeName, oldActiveName) {
      console.log('即将离开的标签页的名字是: ' + oldActiveName)
      console.log('即将进入的标签页的名字是: ' + activeName)
      // 返回false则阻止标签页切换
      if (oldActiveName === '0') {
        if (this.addForm.goods_name === '') {
          this.$message.error('请先填写商品名称')
          return false
        } else if (this.addForm.goods_price === 0) {
          this.$message.error('请先填写商品价格')
          return false
        } else if (this.addForm.goods_weight === 0) {
          this.$message.error('请先填写商品重量')
          return false
        } else if (this.addForm.goods_number === 0) {
          this.$message.error('请先填写商品数量')
          return false
        } else if (this.addForm.goods_cat.length !== 3) {
          this.$message.error('请先选择商品分类')
          return false
        }
      }
      if (oldActiveName === '0' && (activeName === '2' || activeName === '3' || activeName === '4')) {
        this.$message.error('请按步骤来填数据')
        return false
      } else if (oldActiveName === '1' && (activeName === '3' || activeName === '4')) {
        this.$message.error('请按步骤来填数据')
        return false
      } else if (oldActiveName === '2' && activeName === '4') {
        this.$message.error('请按步骤来填数据')
        return false
      }
    },
    // tab点击事件
    tabClicked() {
      console.log(this.activeIndex)
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        return this.getManyCate()
      } else if (this.activeIndex === '2') {
        return this.getOnlyCate()
      }
    },
    // 获取商品动态参数列表
    async getManyCate() {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取动态参数列表失败！')
      }
      console.log(res)
      res.data.forEach(item => {
        if (item.attr_vals.length === 0) {
          item.attr_vals = []
        } else {
          item.attr_vals = item.attr_vals.split(' ')
        }
      })
      this.manyTableData = res.data
    },
    // 获取商品静态参数列表
    async getOnlyCate() {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取静态参数列表失败！')
      }
      console.log(res)
      this.onlyTableData = res.data
    },
    // 处理函数预览图片
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      // 1.拼接得到图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2.将图片信息对象存放到数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    // 处理移除图片的操作
    handleRemoveImg(file) {
      console.log(file)
      // 1.获取图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2.从pics数组中找到图片的索引值
      const i = this.addForm.pics.findIndex(x =>
        x.pic === filePath
      )
      // 3.调用数组splice方法移除图片信息
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    add() {
      // console.log(this.addForm)
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加的业务逻辑
        // lodash cloneDeep(obj)深拷贝
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数和静态属性
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
         this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        // 发起请求添加商品
        // 商品名称唯一
        const { data: res } = await this.$http.post('goods', form)
        console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox{
  margin: 0px 10px 0 0 !important;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}
</style>
